Checker brickwork construction for regenerator furnaces



3 Sheets-Sheet l W. B. MiTCHELL Filed June Feb. 14, 1933.

CHECKER BRICKWQRK CONSTHUCTIQN FOR REGENERATOR FURNACES Feb. 14, 1933. W, B, MITCHELL v 1,897,270

CHECKER BRICKWORK CONSTRUCTION FOR REGENERATOR FURNACES Filed June l3.6, 1952 Shee'Is-Sheet 2 Feb. 14, 1933. W, B, M|TCHELL 1,897,270

CHEGKER BRICKWORK CONSTRUCTION FOR REGENERATOR FURNACES Filed June 16, 1932 3 Sheets-Sheet Z5 Patented Feb. 14, 1933 UNITED STATES PATENT OFFICE WILLIAM BOYD MITCHELL, F GLASGOW, SCOTLAND Application filed June 16, 1932, Serial No. 617,516, andan Great Britain February 16, 1932.

This invention relates to improvements in checker brickwork constructions for regenerator furnaces.

According to the invention the checker brickwork presents av plurality of gas passages bounded by sinuous walls and each of substantially the same cross sectional area throughout and uninterrupted by projections, ensuring effective turbulence of the gases and,

by continuous deection of the gas stream,

effecting rapid heat exchange.

As hereinafter described the filler bricks constituting the checker work are of generally rectangular form but have two opposed 5 convexly and concavely curved faces.

In the accompanying drawings Figs. 1 and 2, 3 and 4, and 5 and 6, are elevations at right angles to each other showing three forms of brick designated hereinafter for convenience of description as bricks A, B and C, respectively; Figs. 7 and 8 shows a portion of a checker-work structure composed of bricks A and presenting a plurality of gas passages each of which is bounded by four sinuous walls, Fig. 7 being a plan view and Fig. 8 a section on the line a-a or on the line 6 6 of Fig. 7 Figs. 9, 10 and 11 show a portion of a checker-work structure composed of bricks B and C presenting a plurality of gas passages each of which is bounded by two opposed sinuous walls and by two opposed plane walls at right angles to the sinuous walls, Fig. 9 being a plan view, Fig. 10 a section on the line 0 0 of Fig. 9, and Fig. 11 a section on the line d-d of Fig. 9; Figs. 12 and 13 show a portion of a checkerwork structure comprising a combination of bricks B and Cl so assembled that the bricks B and C of any one course are disposed, respectively, at right angles to the bricks B and C of the next underlying course, Fig. 12 being a. vertical section and Fig. 13 a vertical section on the line e-e of Fig. 12.

5 The structure shown in Figs. 7 and 8 is composed of filler bricks A (Figs. 1 and 2) eac-h formed as a. segment having convex and concave cylindrical lateral faces 1, 2, respectively, of the same radius of curvature and 50 having plane top and bottom sides 3 parallel to the axes of said cylindrical surfaces, and

.plurality convex and concave ends 4f, 5, respectively, of the same radius of curvature, equal to the radius of curvature of the lateral faces 1,

2, the bricks being so assembled that the resultant checker-work structure presents a of gas passages 6 each of which is bounded by four sinuous walls.

The bricks A are mated T fashion to form superposed grid-like courses, the bricks constituting each course facing reversely to the bricks of the next underlying course.

The structure shown in Figs. 9-11 is composed of bricks B and C (Figs. 3 6), each brick C being formed as a segment having convex and concave cylindrical lateral faces 7, 8, respectively, of the same radius of curvature, parallel top and bottom sides 9,

and parallel ends 10 at right angles to the sides 9, and eachV brick B being formed as a flat slab having parallel top and bottom sides 11 and convexly and concavely curvedy ends 12, 18, respectively, of the same radius of curvature, equal to the radius of curvature of the cylindrical faces 7 8 of the bricks C.

rThe structure constituted by assembling such bricks presents a plurality of gas passages 14 each o-f which is bounded by two opposed sinuous walls and two opposed plane Walls transverse to the sinuous walls.

Alternatively, and as shown in Figs. 12 and '80 13, the bricks may be so assembled that the bricks B and C of any course are respectively disposed transversely to the bricks B and C of the next underlying course.

The bricks B andC are mated T fashion to form superposed grid-like courses, the

bricks B running at right angles to the bricks C and in each course the C bricks curve reversely to the C bricks on the underlying' course.

I claim 1. A checker brickwork construction for regenerato-r furnaces comprising superposed courses each constituted by Eller bricks ary ranged in transverse rows, said iiller bricks 95 being each formed with two exposed parallel faces which are respectively convexly and concavely curved.

2. A checker brickwork construction for regenerator furnaces as claimed in claim 1 m0 built up of filler bricks each formed as a segment having cylindrical lateral faces of the same radius of curvature and convexly and concavely curved ends of a radius of curvature equal to the radius of curvature of the lateral faces.

8. A checker brickwork construction as claimed in claim l built up of filler bricks of two forms, one in the form of a segment having convex and concave lateral faces of the same radius of curvature, parallel top and bottom sides, and parallel ends at right angles to the sides, and the other in the form of a flat slab having paralleltop and bottom sides and convex and concave ends of the same radius of curvature, equal tothe radius` of curvature of the lateralfaces of the first mentioned form.

4. As an element of achecker brickwork constructionfor regenerator furnaces a filler Y brlck 1n the form of a prism segment having 1- parallel faces which are respectively convexly and concavely curved cylindrical faces of the same radius of curvature."`

5. A filler brick as claimed ink claim 4 of generally rectangular form as seen in at least one elevational view thereof.

6. A ller brick as claimed in'cla-im 4 having convexly and concavely curved ends.

7. A checkerbrickwork construction for regenerator furnaces comprising superposed courses of'filler bricks each of simple prismatic form presenting only six ruled surfaces, the bricks in each Ycourse being arranged in T-relation to present a plurality of gas passages of substantially rectangular form in horizontal section and substantially the same horizontal cross sectional area throughout,

said passages being uninterrupted by proj ections and presenting paths for the gases Vsuch that the gasesv are deflected by at least two walls of each passage.

8.A checker brickwork. construction Hfor regeneratorfurnaces as claimed'in claim 7 in which one of the surfaces of each filler brick of a set is concavely curved'- and the surface parallel to said first mentioned surface is convexly curved tothe same radius as said irst' mentioned surface, and the'remaining surfaces of the brick are plane.

9. A `checker brickwork construction for regenerator furnaces as claimed inv claim 7 in which two parallel lateral faces of each filler brick of a set are respectively concavely and convexly curved, the end faces are re- Y spectively concavely and convexly curved, and the two remainingfaces Aare plane.

In testimony name to this specification.

WILLIAM vBorn MrrcHELL.

whereof I .have signed myV 

